High Quality Content by WIKIPEDIA articles! Companies House is the United Kingdom Registrar of Companies and is an Executive Agency of the United Kingdom Government Department for Business, Innovation and Skills (BIS). All forms of companies (as permitted by the United Kingdom Companies Act) are incorporated and registered with Companies House and file specific details as required by the current Companies Act 2006. All registered limited companies, including subsidiary, small and inactive companies, must file annual financial statements, in contrast to registered unlimited companies (meeting certain conditions), in addition to annual company returns, which are all public records.